On 08/01/2016 03:01 AM, Simon Glass wrote: > Hi, > > On 26 July 2016 at 04:55, Tien Fong Chee <tfc...@altera.com> wrote: >> This patch would do checking on device tree to ensure the UART exist >> in the system and ready for console before setting have_console to true. >> This is required to avoid unexpected behavior such as hang during UART >> initialization. >> >> Signed-off-by: Tien Fong Chee <tfc...@altera.com> >> Cc: Dinh Nguyen <dingu...@opensource.altera.com> >> Cc: Dinh Nguyen <dinh.li...@gmail.com> >> Cc: ChinLiang <cl...@altera.com> >> Cc: Thomas Chou <tho...@wytron.com.tw> >> Cc: Simon Glass <s...@chromium.org> >> Cc: Marek Vasut <ma...@denx.de> >> --- >> common/console.c | 11 ++++--- >> common/spl/spl.c | 3 +- >> drivers/serial/serial.c | 58 >> +++++++++++++++++++++++++++++++++++- >> include/asm-generic/global_data.h | 1 + >> include/serial.h | 1 + >> 5 files changed, 66 insertions(+), 8 deletions(-) > > Another way to deal with this would be to have the driver return > -EBUSY (or perhaps -EAGAIN) and set this flag in > serial_find_console_or_panic(). After all, the unavailability of > serial is a driver-specific thing, right?
I think the -EAGAIN makes sense -- use default null console and probe the UART when it's ready. > How / when does the FPGA get programmed on your system? On CV/AV, the FPGA is loaded via the fpga command . -- Best regards, Marek Vasut _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
